Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sydney Blair Pacelli

Physician Assistant in Morristown, NJ · enumerated 2021.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1639746423

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Registry record

Entity type Individual (Type 1)

Name Sydney Blair Pacelli

Sex Female

Practice address 435 South St Ste 370, Morristown, NJ, 07960

Phone (973) 971-7267

Fax (973) 290-7520

Enumeration date Jun 9, 2021

Last updated in NPPES Mar 6, 2025

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 25MP00628600 (NJ) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Sydney Pacelli practice?

The practice location on file with NPPES is in Morristown, NJ. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Sydney Pacelli?

The National Provider Identifier (NPI) for Sydney Pacelli is 1639746423, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-06.